That's not the most important part of verbal components. The most important part is that it makes real, loud noise.Completely remove Verbal and somatic spell components. They have long lived past their usefulness. Instead just assume that there are 3 ways to disable spellcasting.
1) Inside silence.
2) Their hands and/or mouth is bound
3) They cannot access their arcane focus or spell component pouch.
And then if a spell ignores these restrictions, specifically note it as a 'big deal" in the spell itself. These removes all the weirdness with paladins and shields, having to look up components on various spells, how it interacts with ABC, etc. Its all streamlined and simplified.